Gearing transmission



Sept. 22; 1925. 1,554,956

W. J.' DOBKIN GEARING TRANSMISSION Filed Dec. 10, 1921 2 suds-sheet 1INVENTOR ATTORNEY Sept. 22, 1925. 1,554,956

' w. J. DOBKIN GEARING TRANSMISSION Filed Dec. 10, 1921 2 Sheets-Sheet"2 ATTORNEY Patented Sept. 22', 1925.

UNITED 'sTAr sPAIEN-T OFFICE.

WILLIAM J. noBKIN, or CHICAGO, ILLINOIS.

GEARING rRANsMIssIoN.

Application filed December 10, 1921. Serial No. 521,509.

To all whom it may] concem:; I 7

Be it known that I, WILLIAM J. DOBKIN,

a citizen of the United States, residing at Chicago, inthe county of'Cook and State of Illinois, have invented new Improvements in GearingTransmissions, of which the following is a specification.

This invention relates to gearing for transmitting power from a drivingshaft to a driven shaft and an object of the invention is to provide atransmission gear-.

ing embodying. planetary and bevel gears in combination with friction.wheels for transmitting power froman engine shaft or engine to thedriving shaft of a motor vehicle or analogous structure, which gearingstructures are associated .in such a manner as to permit a gradualincreasing of the speed of the driven shaft andeliminating liability ofstripping gears such as is contingent with the approved type ofshiftable transmission gearing as well as eliminating V the ill effectsof sudden shifts or changes in speed.

Anotherobject of the'inventio'n is to provide a gearing structure asspecified'which combines with the arrangement of gradually changeablegearing, the flexibility of a friction drive and positiveness of toothgearing; I e

Other objects of the invention will appear in the followingdetaileddescription taken in connection with the accompanying drawings wherein:

Fig. 1 is a longitudinal section through the improved gearing.

Fig. 2 is a section taken on the line 2- 2 of Fig. 1.

Fig. 3 is a section taken on the line 33 of Fig. 1. i

Fig. 4is a fragmentary view of a part ofthe gearing structure, the saidportion indicated by the line 4+4 on Fig. 1 of the drawings.

Fig. 5 is a detail view of a gear carrying coupling.

Referring more particularly to the drawings, the driving shaft 1 isadapted to have connection with .an engine,.motor or other prime moverand it has an enlarged recessed end 2 located in'the gear casing 3 intowhich the inner end of the driven shaft 4 extends. The driven shaft 4has a bevel gear 5 keyed thereon which meshes with idler bevel gears 6and 7 carried by the stub shaft ends 8 of the coupling 9. The hub anduseful stationary, however, as thedisc 27 is shifted gear the movable orplanetary gears 17 mesh. 'lhegears 17 are rotatably carried by stubshafts 18- which project laterally. from a disc 19 which isalso mountedupon the driving shaft 1 for independent rotation relative thereto. 'Thegears 17. are

adapted to travel in a circular path concentrically of the shaft 1 andthey mesh with the internal ring gear 20 which is rigidly attached tothe casing 3 in any suitable manner such as by bolts 21..

The hub 22 ofv he disc 19 has'a; worm gear 23 mounted thereon with whichthe worm 2 1 meshes. The worm 24 is carried by a shaft 25 which extendstransversely to the driving shaft 1 and is rotatably supported bysuitable bearings in the casin 3.. 'The shaft 25 has a friction" disc 2feathered thereon which friction disc has a channel collar 28 carriedthereby to permit connection of a shifting leverr'therewith. Thefriction'disc 27 engages with its periphery, the friction face of asecond friction? 7 disc 29 for rotating the shaft '25.; Thedisc 29iscarried by a shaft 30.- whichjis in turn operatively connected to thedriving shaft- 1 by. gears 31 and 32 as clearlyshown 1n Figs. land 3 ofthe drawings. I When the disc 27 is shifted .so that itwill engage thedisc 29 at the center or axis of the disc 29 the shaft 25 will beoutwardly towards the perimeter of the disc 29 the shaft 25 will berotated, the speed of the shaft 25 depending upon the distance of thepoint of contact of the friction disc 27 with the friction disc 29 fromthe axis of the latter disc. The rotation of the shaft 25 willbeimparted through the worm gear 23 to the disc19 which will in turnrotate the gears 17 and move them aboutthe ring gear 20 rotating them ina'planetary manner and above their individual axis whlch will no .impartrotation to the yoke 14 and move gear 5 will be rotated in 'areversedirecthe gear 5 will be stationary relative to the gear 11 and uponfurther'movement the tion to the direction in which it is normally orwas previously rotated thus providing for the reversing of the-directionofrota-.

tion of the shaft-4 which reversing is caused by the increased rate ofrotating speed of the gears 6 and 7 about the axis of the shafts 1 and4.

When the shaft 25 is stationary at which time the yoke 14 isalsostationary the shaft 4 will be driven direct from the shaft 1 at thesame' speed of rotation of the shaft 1 through the bevel gears 5, 6, 7and 11.

It is of course, to-be understood that the invention may be constructedin other manmm and the parts associated in other relations and,therefore, I donot desire to be limited in any manner except asset forthin the claiins hereunto appended.

Havingthus described my invention what I claim is:

1. In a-gear transmission, a driven shaft and a driving shaft, a bevelgear on the A driven shaft, asimilar gear on the driving shaft, stubshafts supported upon the driving shaft, bevel gears carried thereby andmeshing with the gears, on the driven and driving shaft, a stationaryring ear, a planet carrier disc, a plurality 0 gears carried by saiddisc and meshing with the ring gear, a spider on the drive shaft, a

' gear carried by the s ider and meshing with the gears on. the 1sc,means connecting the spider with the stub shafts for moving the sameabout the axis of the driving shaft,

' and adjustable power transmitting means I stub shafts for moving thesame about the.

connecting said driving shaft and said disc for controlling the rotationof the disc.

2. In a gear transmission, a driven shaft and a' driving shaft, a bevelgear on the driven shaft, a similar gear on the driving shaft, stubshafts supported upon the driving shaft, bevel gears carried thereby andmeshing with the gears on the driven and driving shaft, astatlonary ringgear, a planet carrier disc, a plurality of gears carried by said discand meshing with the ring gear, a spider on the drive shaft, a gearcarried by the spider and meshing with the gears on the disc, meansconnecting the spider with the axis of the drivin shaft, a pair of rightangularly dispose friction discs, means connecting one of said discs tosaid driving shaft, the other of said discs being adjustable, and meansconnecting said adjustable friction disc to said planet carrier disc.

3. In a gear transmission, the combination of a drivmg shaft and adriven shaft, a bevel gear on the driven shaft and a bevel gear on thedriving shaft, additional gears operatively engaging the above gears androtatable about'the axis of the shafts, a planetary gear structure,comp-rising operativelyconnected gears all lying-in the same generalplane, means forming operable connection bet-ween the planetary gearstructure and the last named bevel gears for controllin the ratio ofspeed rotation of said drive an drive-n shafts, and friction discs forcontrolling the operation ofsaid planetary gears.

4. In agcar transmission, the combination of a driving shaft and adriven shaft, a bevel gear on the driven shaft and a bevel gear on thedriving shaft, additional gears operatively engaging the above gears androtatable aboutthe axis of the shafts, a planetary gear structurecomprising operatively connected gears all lying in the same generalplane, means forming operable connection between the planetary gearstruc-- ture and the last named bevel gears for controlling the ratio ofspeed rotation of said drive and driven shafts, an auxiliary shaft aworm and worm gear connection between saidauxiliary shaft and planetarygear structure, and speed controlling means controlling rotation of saidauxiliary shaft and the operation of said planetary gearing.

5. In a gear transmission, the combination of a driving shaft and adriven shaft, a bevel'gear on the'driven shaft and a bevel gear on thedrivingshaft, additional gears operatively engaging the above gears androtatable about the axis of the shafts, a planetary gear structure,comprising operatively connected gears all lying in the same generalplane, means forming operable connection between the planetary gearstructure and the last named bevel gears for controlling the ratio ofspeed rotation'of said drive and driven shafts, an auxiliary shaft, a,worm and worm gear connection between said auxiliary shaft andplanetary gear structure, speed controlling means controlling rotationof said auxiliary shaft and the operation of said planetary gearing,friction discs for controlling the operation of the planetary gearstructure, and means connecting said friction discs and driving shaft.

In testimony whereof I afiix my signature.

WILLIAM J. DOBKIN.

